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bitrex
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I've been reading up on inductor and transformer design, and was interested to read the following: "Ideal magnetic materials cannot store energy, and practical magnetic materials store very little energy, most of which ends up as loss." So if I'm understanding this correctly, a big 10 Henry filter choke is designed to channel all the magnetic flux through the high permeability steel into the air gap? It seems kind of ironic that all of that copper and steel is required to construct the inductor when the "real work" is all being done by the air gap! I'm having a hard time understanding why air can "store" magnetic energy, but the steel can only "channel" it.